Hi Bastien,
This is a first pass at a driver for the Wacom Graphire Bluetooth
tablet, based on work by Andrew Zabolotny[1]. It's mildly tested
(eg. it
works in my very few tests).
I was looking for guidance for the code itself, possibly making it
easier to merge in the input/tablet/wacom* drivers into it in the
future, as well as some explanations as to how I'm supposed to reset
tools, etc. so the user-space drivers (the X.org linuxwacom driver)
doesn't need special-casing for the device.
Note that it requires a user-space activation to switch to Mode 2,
using
bluetoothd (as the Bluetooth HID doesn't support
hid_output_raw_event).
Patch at:
http://cvs.fedoraproject.org/viewvc/rpms/bluez/devel/bluez-activate-wacom-mode2.patch?view=markup
A couple of notes:
- the wheel action is reversed, it's a simple fix, done locally
- hidp and the Bluetooth sub-system says it can't probe the device
with
error "-14" when hid-wacom.ko isn't already loaded
what was the reason for not forcing HID to load the generic driver? I
lost track on how HID is suppose to handle these. You could also
introduce a phony export like we do with L2CAP to ensure it is loaded
even if userspace isn't ready to handle this dependency.
- I'm getting oopses in hci_conn_del() when the device goes away
(eg. I
turn it off).
Try to run a net-next-2.6 or bluetooth-next-2.6 kernel. Kyle should
have merged these patches into the latest rawhide kernel.
I'd appreciate any help making this just a tad more stable.
Any comments about the code itself?
The main parsing function looks highly complicated and could either
use more comments or break into two.
if ((wdata->tool = tool)) {
input_report_key(input, tool, 1);
need_sync = 1;
}
Don't do the assignment in the if clause test. Did you run
checkpatch.pl on it?
Regards
Marcel
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